JP6306131B2 - Curable composition, article, curing method, and tack-free reaction product - Google Patents

Description

Detailed Description of the Invention

式中、Ｒは、一価の有機基を表す。多くの場合、これらは環炭素の１個以上が更に置換される。Ｒが１個以上の芳香族基を含有する場合、３−置換ベンゾオキサジンは、周囲条件下で非常に粘稠であるか又は更には固体であり得る。 [background]
In its simplest form, 3-substituted-3,4-dihydro-2H-1,3-benzoxazine (hereinafter referred to as 3-substituted benzoxazine) is a compound containing the following structural units.

In the formula, R represents a monovalent organic group. In many cases, they are further substituted with one or more of the ring carbons. When R contains one or more aromatic groups, the 3-substituted benzoxazine can be very viscous or even solid under ambient conditions.

  3-Substituted benzoxazines are typically homopolymerized at high temperatures and can typically be cured with polythiols at low temperatures. For example, WO 2010/141396 (A1) (Gorodisher et al.) Describes a benzoxazine-thiol adduct that when cured produces a composition useful in coatings, sealants, adhesives and other applications. It is described. Similarly, WO 2009/115586 (A1) (Burns et al.) Describes adducts useful for improving toughness and curable compositions using such toughening adducts. .

[Overview]
We often find that mixtures of N-aryl-substituted benzoxazines and thiols have high viscosities that exhibit the desired thermal stability and reactivity but can make them difficult to use. It was found to produce an adduct. In contrast, mixtures of 3-substituted benzoxazines (eg, N-alkyl benzoxazines) and thiols often show reduced thermal stability and improved reactivity.

  The inventors have discovered 3-substituted benzoxazine / thiol based compositions that can overcome the above disadvantages and provide additional benefits to the materials.

（式中、
ｖは０又は１であり、
ｔは１〜６（１と６を含む）の範囲の整数であり、
Ｒ^１４は、１〜３０個の炭素原子を有するｔ価ヒドロカルビルラジカルであり、
Ｒ^１５は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するヒドロキシアルキレン基、１〜３０個の炭素原子を有するオキシアルキレン基、４〜１００個の炭素原子を有するポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択され、
Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子を有するアルキレンポリオキシアルキレン基及びこれらの組み合わせからなる群から選択され、
Ｒ^１７は、１〜３０個の炭素原子を有するアルキレン基である）からなる群から選択される少なくとも１つのポリチオールをｚ当量（ｚは０を超える数であり、ｚは０．１（ｘ＋ｙ）〜（ｘ＋ｙ）の範囲である）と、
を含む硬化性組成物を提供する。 According to this, in one aspect, the present disclosure is:
At least one 3-substituted benzoxazine in x equivalents (x is a number greater than 0);
At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 1 to 6 (including 1 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
A curable composition is provided.

In another aspect, the disclosure provides
Providing a curable composition according to the present disclosure;
And a step of curing the curable composition.

（式中、
ｖは０又は１であり、
ｔは１〜６（１と６を含む）の範囲の整数であり、
Ｒ^１４は、１〜３０個の炭素原子を有するｔ価ヒドロカルビルラジカルであり、
Ｒ^１５は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するヒドロキシアルキレン基、１〜３０個の炭素原子を有するオキシアルキレン基、４〜１００個の炭素原子を有するポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択され、
Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子を有するアルキレンポリオキシアルキレン基及びこれらの組み合わせからなる群から選択され、
Ｒ^１７は、１〜３０個の炭素原子を有するアルキレン基である）からなる群から選択される少なくとも１つのポリチオールをｚ当量（ｚは０を超える数であり、ｚは０．１（ｘ＋ｙ）〜（ｘ＋ｙ）の範囲である）と、
を含む硬化性組成物のタックフリー反応生成物を提供する。 In another aspect, the disclosure provides
At least one 3-substituted benzoxazine in x equivalents (x is a number greater than 0);
At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 1 to 6 (including 1 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
A tack-free reaction product of a curable composition is provided.

  In yet another aspect, the present disclosure provides an article comprising a curable composition according to the present disclosure disposed on a release liner.

  Advantageously, the composition according to the present disclosure may be formulated to exhibit good thermal stability and good reactivity and to have a lower viscosity than the corresponding 3-substituted benzoxazine / thiol-based composition. it can. In some cases, additional benefits may be obtained.

  For example, a curable composition according to the present disclosure can be formulated to reduce the cure time required to achieve a glass transition temperature of 100 degrees Celsius (° C.).

  In some embodiments, the curable composition according to the present disclosure comprises a B-stage composition (eg, as a sheet or tape) where flexibility and tack are typically important parameters for handling. Strategic selection of polyepoxides and / or polythiols allows for the careful preparation of flexibility and adhesive properties for a wider range of 3-substituted benzoxazines than previously available.

  The features and advantages of the present disclosure will become better understood when considering the form for carrying out the invention and the appended claims.

1 is a schematic cross-sectional view of a representative article 100 according to the present disclosure. Plot of heat flow versus temperature as measured by a differential scanning calorimeter. Plot of loss rate (E ″) versus temperature as measured by dynamic mechanical analysis. Plot of storage modulus (E ') versus temperature as measured by dynamic mechanical analysis. Plot of storage modulus (E ') versus temperature as measured by dynamic mechanical analysis. Plot of storage modulus (E ') versus temperature as measured by dynamic mechanical analysis. Plot of storage modulus (E ') versus temperature as measured by dynamic mechanical analysis. Plot of loss factor versus temperature as measured by dynamic mechanical analysis. Plot of loss factor versus temperature as measured by dynamic mechanical analysis. Plot of loss factor versus temperature as measured by dynamic mechanical analysis. Plot of loss factor versus temperature as measured by dynamic mechanical analysis. Plot of loss factor versus temperature as measured by dynamic mechanical analysis.

  While the above drawings describe multiple embodiments of the present disclosure, other embodiments are possible as described in the discussion. In all cases, this disclosure is presented by way of representation of the present disclosure and not limitation.

[Detailed description]
As used herein, the term “heteroalkyl” refers to an alkyl having one or more heteroatoms independently selected from S, O and N substituted with carbon. Examples include methoxy, ethoxy, propoxy, 3,6-dioxaheptyl and 4-dimethylaminobutyl.

  As used herein, the term “heteroaryl” refers to an aryl in which one or more heteroatoms independently selected from S, O, and N are substituted with carbon. Examples include pyridyl, furanyl, pyrrolyl, thienyl, thiazolyl, oxazolyl, imidazolyl, indolyl, benzofuranyl, and benzthiazolyl.

  As used herein, the term “hydrocarbyl” refers to a hydrocarbon with one hydrogen atom removed. Examples include phenyl, butyl, methyl, dodecyl, behenyl, ethylphenyl and diphenylmethyl.

  As used herein, the term “heterohydrocarbyl” refers to a hydrocarbyl in which one or more heteroatoms independently selected from S, O and N are substituted with carbon. Examples include methoxy, ethoxy, propoxy, 4-diphenylaminobutyl, 2- (2'-phenoxyethoxy) ethyl, 3,6-dioxaheptyl and 3,6-dioxahexyl-6-phenyl.

  The curable composition according to the present disclosure includes at least one 3-substituted benzoxazine. 3-Substituted benzoxazines are typically condensations of phenols, primary amines and aliphatic aldehydes (typically formaldehyde) (but other aldehydes such as alicyclic aldehydes or alkaryl aldehydes are also used). For example, according to methods established over the years.

  If a compound that incorporates more of the 3-substituted benzoxazine moiety is desired, a polyamine having more than two amino groups can be used. Alternatively, polyphenols such as bisphenol A or bisphenol F can be combined with monoamines and formaldehyde, for example, to make compounds having more than one 3-substituted benzoxazine group. If desired, oligomeric and / or polymeric benzoxazine resins can be made using polyphenols in combination with polyamines and formaldehyde. For further details regarding the synthesis of 3-substituted benzoxazines (including resins) see, eg, US Pat. Nos. 4,501,864 (Higginbottom), 5,543,516 (Ishida) and 7, No. 041,772 (Aizawa et al.). Other methods are described in N.W. N. Ghosh et al. "Polybenzoxazine-new high performance thermosetting resins: synthesis and properties" (Prog. Polym. Sci. (2007), vol. 32, pp. 1344 to 1391).

式中、
Ｒ^１は、１〜２０個の炭素原子を有するヒドロカルビル又はヘテロヒドロカルビル基を表す。一部の実施形態では、Ｒ^１は、１〜２０個の炭素原子又は更には１〜８個の炭素原子を有する。例としては、フェニル、メチル、エチル、ドデシル、−ＣＨ_２ＣＨ_２Ｎ（ＣＨ_３）及びＣ_６Ｈ_５ＮＨ（ＣＨ_２）_２ＮＨ（ＣＨ_２）_２ＮＨ_２が挙げられる。
Ｒ^２、Ｒ^３、Ｒ^４及びＲ^５は、単独又は組み合わせて、Ｈ、ハロゲン（例えば、Ｂｒ、Ｃｌ、Ｆ）、１〜１２個の炭素原子を有するヒドロカルビル基、又は１〜１２個の炭素原子を有するヘテロヒドロカルビル基を独立して表す。例えば、Ｒ^２〜Ｒ^５は独立して、アルキル（例えば、メチル、エチル、プロピル、ヘキシル、エチルヘキシル又はオクチル）、アリール（例えば、フェニル、ナフチル又はフェナンスリル）、アラルキル（例えば、フェニルエチル又はベンジル）、又はアルカリル（例えば、エチルフェニル、ジメチルフェニル又はメチルフェニル）、ヘテロアルキル（例えば、メトキシ、メトキシエチル、チオエチル、ジメチルアミノ、ジエチルアミノ、エトキシ、プロポキシ、３，６−ジオキサへプチル又は４−ジメチルアミノブチル）、ヘテロアリール（例えば、ピリジル、フラニル、ピロリル、チエニル、チアゾリル、オキサゾリル、イミダゾリル、インドリル、ベンゾフラニル及びベンゾチアゾリル）、ヘテロアルカリル、ヘテロアラルキルを表す。
Ｒ^６は、Ｈ、又は、１〜１２個の炭素原子を有するヒドロカルビルを表す。例としては、（例えば、メチル、エチル、プロピル、ヘキシル、エチルヘキシル又はオクチル）、アリール（例えば、フェニル又はナフチル）、アラルキル（例えば、フェニルエチル又はベンジル）又はアルカリル（例えば、エチルフェニル、ジメチルフェニル又はメチルフェニル）が挙げられる。 The 3-substituted benzoxazine can have additional substituents. For example, in some embodiments, a 3-substituted benzoxazine can be represented by the following formula:

Where
R ¹ represents a hydrocarbyl or heterohydrocarbyl group having 1 to 20 carbon atoms. In some embodiments, R ¹ has 1-20 carbon atoms or even 1-8 carbon atoms. Examples include phenyl, methyl, ethyl, dodecyl, —CH ₂ CH ₂ N (CH ₃ ), and C ₆ H ₅ NH (CH ₂ ) ₂ NH (CH ₂ ) ₂ NH ₂ .
R ² , R ³ , R ⁴ and R ⁵ , alone or in combination, are H, halogen (eg, Br, Cl, F), hydrocarbyl group having 1 to 12 carbon atoms, or 1 to 12 carbons. Heterohydrocarbyl groups having atoms are represented independently. For example, R ^{2 to} R ⁵ are independently alkyl (eg, methyl, ethyl, propyl, hexyl, ethylhexyl or octyl), aryl (eg, phenyl, naphthyl or phenanthryl), aralkyl (eg, phenylethyl or benzyl), Or alkaryl (eg ethylphenyl, dimethylphenyl or methylphenyl), heteroalkyl (eg methoxy, methoxyethyl, thioethyl, dimethylamino, diethylamino, ethoxy, propoxy, 3,6-dioxaheptyl or 4-dimethylaminobutyl) , Heteroaryl (eg, pyridyl, furanyl, pyrrolyl, thienyl, thiazolyl, oxazolyl, imidazolyl, indolyl, benzofuranyl and benzothiazolyl), heteroalkaryl, heteroaralkyl .
R ⁶ represents H or hydrocarbyl having 1 to 12 carbon atoms. Examples include (eg methyl, ethyl, propyl, hexyl, ethylhexyl or octyl), aryl (eg phenyl or naphthyl), aralkyl (eg phenylethyl or benzyl) or alkaryl (eg ethylphenyl, dimethylphenyl or methyl). Phenyl).

式中、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^５及びＲ^６は先に定義された通りであり、Ｒ^７は、１〜５０個の炭素原子を有する二価有機基を表す。Ｒ^７の例としては、１〜１２個の炭素原子を有するアルキレン（例えば、メチレン、エチレン、プロピレン、ドデシレン）、アリーレン（例えば、フェニレン、ビフェニレン）、ヘテロアルキレン（例えば、−（ＣＨ_２ＣＨ_２ＮＨ）_１〜１０ＣＨ_２ＣＨ_２−、
−（ＣＨ_２ＣＨ_２ＣＨ_２ＣＨ_２ＮＨ）_１〜１０ＣＨ_２ＣＨ_２ＣＨ_２ＣＨ_２−、−（ＣＨ_２）_４ＮＨ（ＣＨ_２）_３−、
−ＣＨ_２）_３ＮＨ（ＣＨ_２）_４ＮＨ（ＣＨ_２）_３−、−（ＣＨ_２）_３ＮＨ（ＣＨ_２）_２ＮＨ（ＣＨ_２）_３−、−（ＣＨ_２）_２ＮＨ（ＣＨ_２）_３ＮＨ（ＣＨ_２）_２−、
−（ＣＨ_２）_３ＮＨ（ＣＨ_２）_２−、−（ＣＨ_２ＣＨ_２Ｏ）_１〜２０ＣＨ_２ＣＨ_２−及び−（ＣＨ_２ＣＨ_２ＣＨ_２ＣＨ_２Ｏ）_１〜１５ＣＨ_２ＣＨ_２ＣＨ_２−）、
及び−（ＣＨ_２）_３ＮＨＣＨ_２ＣＨ＝ＣＨＣＨ_２ＮＨ（ＣＨ_２）_３−が挙げられる。 In some embodiments, the 3-substituted benzoxazine can be represented by the following formula:

In the formula, R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are as defined above, and R ⁷ represents a divalent organic group having 1 to 50 carbon atoms. Examples of R ⁷ include alkylene having 1 to 12 carbon atoms (eg, methylene, ethylene, propylene, dodecylene), arylene (eg, phenylene, biphenylene), heteroalkylene (eg, — (CH ₂ CH ₂ NH _1-10 CH ₂ CH _2- ,
_{- (CH 2 CH 2 CH 2} CH 2 NH) 1~10 CH 2 CH 2 CH 2 CH 2 -, - (CH 2) 4 NH (CH 2) 3 -,
_{-CH 2) 3 NH (CH 2} ) 4 NH (CH 2) 3 -, - (CH 2) 3 NH (CH 2) 2 NH (CH 2) 3 -, - (CH 2) 2 NH (CH 2) ₃ NH (CH ₂ ) _2- ,
_{- (CH 2) 3 NH (} CH 2) 2 -, - (CH 2 CH 2 O) 1~20 CH 2 CH 2 - and _{- (CH 2 CH 2 CH 2} CH 2 O) 1~15 CH 2 CH 2 CH ₂ -),
And — (CH ₂ ) ₃ NHCH ₂ CH═CHCH ₂ NH (CH ₂ ) ₃ —.

（ＡＲＡＬＤＩＴＥ ＭＴ ３５６００として入手可能である）；

（ＡＲＡＬＤＩＴＥ ＭＴ ３５７００として入手可能である）；

（ＡＲＡＬＤＩＴＥ ＭＴ ３５８００として入手可能である）；

（ＡＲＡＬＤＩＴＥ ＭＴ ３５９００として入手可能である）；及び

（ＡＲＡＬＤＩＴＥ ＭＴ ３６０００として入手可能である）。 Commercially available 3-substituted benzoxazines include Huntsman Corp. Those available under the trade name ARALDITE MT from LLC (Salt Lake City, Utah). Specific examples include the following:

(Available as ARARDITE MT 35600);

(Available as ARARDITE MT 35700);

(Available as ARARDITE MT 35800);

(Available as ARARDITE MT 35900); and

(Available as ARALDITE MT 36000).

（四国化成工業株式会社（日本、香川）からＰ−Ｄ ＢＥＮＺＯＸＡＺＩＮＥとして入手可能である）。 Additional commercially available 3-substituted benzoxazines include the following:

(Available from Shikoku Kasei Kogyo Co., Ltd. (Kagawa, Japan) as PD BENZOXAZINE).

When a bifunctional amine (ie, diamine) is used, for example, a compound having two benzoxazine moieties as shown below is obtained (wherein Z represents a divalent organic group).

  Only some of the useful 3-substituted benzoxazines are shown above, for example 3-substituted benzoxazines such as those obtained by synthesis with various phenols, amines and aldehydes by the above method. Other structures are also envisioned. Representative such phenols, amines and aldehydes are described below.

  Mono- and polyphenols may be used. Phenols that can be further substituted without limitation are desirable. For example, phenol is alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, aralkyl, heteroaralkyl, alkoxy, alkoxyalkylene, hydroxyalkyl, hydroxyl, haloalkyl, carboxyl, halo, amino, aminoalkyl, alkylcarbonyloxy, alkyl It can be substituted with substituents such as oxycarbonyl, alkylcarbonyl, alkylcarbonylamino, aminocarbonyl, alkylsulfonylamino, aminosulfonyl, sulfo, or alkylsulfonyl groups. Desirably, at least one ring position adjacent to the phenolic hydroxyl group is left unsubstituted to promote benzoxazine ring formation.

  The aryl moiety of the phenol may be a phenyl ring or may be selected from naphthyl, biphenyl, phenanthryl and anthracenyl. The aryl ring of phenol may further include a heteroaryl ring containing 1 to 3 heteroatoms such as nitrogen, oxygen, or sulfur, and may contain a condensed ring. Some examples of heteroaryl are pyridyl, furanyl, pyrrolyl, thienyl, thiazolyl, oxazolyl, imidazolyl, indolyl, benzofuranyl, and benzthiazolyl.

  Examples of monofunctional phenols include phenol, cresol, 2-bromo-4-methylphenol, 2-aliphenol, 4-aminophenol. Examples of polyphenols include phenolphthalein, biphenol, bisphenol F, 4,4′-dihydroxybenzophenone, bisphenol A, 1,8-dihydroxyanthraquinone, 1,6-dihydroxynaphthalene, 2,2′-dihydroxyazobenzene, resorcinol, Fluorine bisphenol and 1,3,5-trihydroxybenzene are mentioned. A combination of phenols can also be used.

  Suitable aldehydes for the preparation of 3-substituted benzoxazines include, for example, formaldehyde, paraformaldehyde, 1,3,5-trioxane, and aliphatic aldehydes (eg, aliphatic aldehydes having 1 to 12 carbon atoms). Can be mentioned. Examples of aliphatic aldehydes include crotonaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and heptaldehyde. Combinations of aldehydes can also be used.

  The amines useful in the preparation of 3-substituted benzoxazines can be substituted or unsubstituted, monosubstituted, disubstituted, or more substituted (hetero) hydrocarbylamines having at least one primary amine group. For example, the amine can be an aliphatic, cycloaliphatic or aromatic amine. The amine may be substituted with groups such as alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, aralkyl, or heteroaralkyl. Combinations of amines can also be used.

Amines useful in the preparation of 3-substituted benzoxazines include, for example, those of the formula R ⁹ (NH ₂ ) _k , which include (hetero) hydrocarbyl monoamines and polyamines. R ⁹ may be a (hetero) hydrocarbyl group having a valence of k. In some embodiments, R ⁹ is alkyl, cycloalkyl, or aryl and k is 1, 2, 3, or 4. In some embodiments, R ⁹ can be selected from monovalent and polyvalent organic groups having 1 to 30 carbon atoms. In some embodiments, R ⁹ is a poly (alkyleneoxy) group (eg, a poly (ethyleneoxy), poly (propyleneoxy), or poly (ethyleneoxy-co-propyleneoxy) group). In some embodiments, R ⁹ comprises a non-polymeric aliphatic, aliphatic, alicyclic, aromatic or alkyl-substituted aromatic moiety having 1 to 30 carbon atoms. In some embodiments, R ⁹ comprises a monovalent polymeric group derived from, for example, polyoxyalkylene, polyester, polyolefin, poly (meth) acrylate, polystyrene, or polysiloxane.

  Any primary amine may be used. Useful monoamines include, for example, methyl-, ethylamine, propylamine, hexylamine, octylamine, dodecylamine, dimethylamine, methylethylamine and aniline. The terms “diamine” and “polyamine” each refer to an organic compound containing two or at least two primary amine groups. Aliphatic, aromatic, cycloaliphatic and oligomeric di- and poly-amines are all considered useful in the practice of this disclosure. A representative class of useful di- or polyamines is 4,4'-methylenedianiline, 3,9-bis- (3-aminopropyl) -2,4,8,10-tetraoxaspiro [5,5 ] Undecane and polyoxyethylenediamine. Examples of useful diamines include N-methyl-1,3-propanediamine, N-ethyl-1,2-ethanediamine, 2- (2-aminoethylamino) ethanol, pentaethylenehexamine, ethylenediamine, and hexamethylene. Examples include diamine, dodecanediamine, N-methylethanolamine, and 1,3-propanediamine.

Examples of useful polyamines are polyamines having at least two amino groups, wherein at least one of the amino groups is primary and the rest are primary, secondary, or combinations thereof Is mentioned. _{Examples, H 2 N (CH 2 CH} 2 NH) 1~10 H, H 2 N (CH 2 CH 2 CH 2 CH 2 NH) 1~10 H, H 2 N (CH 2 CH 2 CH 2 CH 2 _{CH 2 CH 2 NH) 1~10 H} , H 2 N (CH 2) 3 NHCH 2 CH = CHCH 2 NH (CH 2) 3 NH. ₂ , H ₂ N (CH ₂ ) ₄ NH (CH ₂ ) ₃ NH ₂ , H ₂ N (CH ₂ ) ₃ NH (CH ₂ ) ₄ NH (CH ₂ ) ₃ NH ₂ , H ₂ N (CH ₂ ) ₃ NH _{(CH 2) 2NH (CH 2} ) 3 NH 2, H 2 N (CH 2) 2 NH (CH 2) 3 NH (CH 2) 2 NH 2, H 2 N (CH 2) 3 NH (CH 2) 2 NH ₂ , C ₆ H ₅ NH (CH ₂ ) ₂ NH (CH ₂ ) ₂ NH ₂ , and N (CH ₂ CH ₂ NH ₂ ) ₃ , and linear or branched (including dendrimer) homopolymers, and Polymerizable polyamines such as ethylenediamine copolymers (ie, aziridine).

Useful polyamines also include, for example, H ₂ N—R ¹⁰ —O— (R ¹¹ O) _p — (R ¹² O) _q — (R ¹¹ O) _r —R ¹⁰ —NH ₂ and [H ₂ N ^{_{-R 10 O- (R 11 O)}} p -] poly (alkyleneoxy), such as s ^{-R 13} polyamines.

R ¹⁰ , R ¹¹ and R ¹² independently represent an alkylene group having 1 to 10 carbon atoms. For example, R ¹⁰ can be an alkyl group having 2 to 4 carbon atoms (eg, ethyl, n-propyl, isopropyl, n-butyl or isobutyl), and R ⁷ and R ⁸ are 2 to 3 It can be an alkyl group having a carbon atom (eg ethyl, n-propyl or isopropyl). R ⁹ is the residue of the polyol used to prepare the poly (alkyleneoxy) polyamine (ie, the organic structure remaining when the hydroxyl group is removed). R ¹³ may be branched or straight chain and may be substituted or unsubstituted (but the substituent must not interfere with the oxyalkylation reaction). The number p represents a number of 1 or more, desirably 1 to 150, or even 1 to 20. Structures where p is 2, 3 or 4 are also particularly useful. The numbers q and r represent 0 or more numbers. The number s is 2 or greater, preferably 3 or 4 (to provide polyoxyalkylene triamine and tetraamine, respectively). In some embodiments, p, q, r and s are selected such that the resulting product is a liquid at room temperature to simplify its handling and mixing. Usually, the poly (alkyleneoxy) polyamine is a liquid.

  Examples of poly (alkyleneoxy) polyamines include poly (ethylene oxide) diamine, poly (propylene oxide) diamine, poly (propylene oxide) triamine, diethylene glycol propylene diamine, triethylene glycol propylene diamine, poly (tetramethylene oxide) diamine, poly (Ethylene oxide) -co-poly (propylene oxide) diamine and poly (ethylene oxide) -co-poly (propylene oxide) triamine.

  Examples of suitable commercially available poly (alkyleneoxy) polyamines include those available under the trade name JEFFAMINE from the Huntsman Chemical Company (Salt Lake City Utah), such as the JEFFFAMINE D, ED and EDR series of diamines (eg, D- 400, D-2000, D-5000, ED-600, ED-900, ED-2001 and EDR-148), and JEFFAMINE T series triamines (eg, T-403), and Union Carbide Company (Danbury, And poly (alkyleneoxy) polyamines available as H221 from Connecticut.

  Useful polyamines include, for example, amine-terminated oligo- and poly- (diaryl) siloxanes, and (dialkyl) siloxanes, amino-terminated polyethylene or polypropylene, and amino-terminated poly (alkylene oxides). Useful polyamines also include polydialkylsiloxanes having pendant or terminal amino groups. Representative commercially available polydialkylsiloxanes having terminal or pendant amine groups include PDMS DIAMINE 5k, 10k or 15k from 3M Company (Saint Paul, Minnesota), Th. TEGOMER A-Si 2120 or 2130 from Goldschmidt (Essen, Germany), Gelest, Inc. DMS-A11, A12, A15, A25 or A32, AMS-132, 152, 162 or 232, or ATM-1112 from Morrisville, Pennsylvania, or RHODORSIL 21443 and 21644 from Rhodia SA (Curvevoie, France) What is available as 21642 or 21737 is mentioned.

  The curable composition according to the present invention comprises at least one polyepoxide (ie a compound having at least two epoxy groups). Examples of polyepoxides that can be utilized in the practice of this disclosure include monomeric polyepoxides, oligomeric polyepoxides, and polymeric polyepoxides. Useful polyepoxides include, for example, aromatic polyepoxides, alicyclic polyepoxides, and aliphatic polyepoxides. Mixtures of polyepoxides can also be used.

  In some embodiments, the at least one polyepoxide includes a glycidyl group.

  Examples of polyepoxides containing glycidyl groups include bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, polyphenols (eg, bisphenol A type resins and derivatives thereof, epoxy cresol novolac resins, epoxy phenol novolac resins). Ethers, glycidyl esters of aromatic carboxylic acids (eg, diglycidyl phthalate, diglycidyl isophthalate, triglycidyl trimellitate and pyromellitic acid tetraglycidyl ester) and N, N, N ′, N′-tetra Examples include glycidyl-4,4′-methylenebisbenzenamine.

  Examples of commercially available glycidyl group-containing polyepoxides are those having the trade name ARALDITE available from Huntsman Chemical Company (eg, ARALDITE MY-720, ARALDITE MY-721, ARALDITE 0510, ARALDITE PY-720 and ARALDITE EPN 79). Those having the trade names EPON RESIN (eg EPON RESIN 828, EPON RESIN 826, EPON RESIN 862 and EPON RESIN CS-377), and DER, for example DER, available from Momentary Specialty Chemicals (Houston, Texas) 330), DEN (eg, DEN 438) Aromatic polyepoxides having the fine DEN 439) and the like.

  When any of the at least one polyepoxide has a glycidyl group (ie, y> 0), the number of glycidyl group equivalents is 0.1 to the equivalent (x) number of glycidyl groups of the 3-substituted benzoxazine group. It is selected to be in the 1 × range.

  In some embodiments, the at least one polyepoxide does not include a glycidyl group. Examples of polyepoxides not containing glycidyl groups include epoxycyclohexanecarboxylates (eg, 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (eg, available under the trade name ERL-4221 from Dow Chemical Co.) 3,4-epoxy-2-methylcyclohexylmethyl 3,4-epoxy-2-methylcyclohexanecarboxylate, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, 3,4-epoxy-6-methylcyclohexyl Methyl 3,4-epoxy-6-methylcyclohexanecarboxylate (available under the trade name ERL-4201 from Dow Chemical Co.), vinylcyclohexene dioxide (eg, Dow Ch available from commercial Co. under the trade name ERL-4206), bis (2,3-epoxycyclopentyl) ether (eg available under the trade name ERL-0400 from Dow Chemical Co.), bis (3,4-epoxy- 6-methylcyclohexylmethyl) adipate (eg available under the trade name ERL-4289 from Dow Chemical Co.), dipentic dioxide (eg under the trade name “ERL-4269” from Dow Chemical Co. Available), 2- (3,4-epoxycyclohexyl-5,1′-spiro-3 ′, 4′-epoxycyclohexane-1,3-dioxane and 2,2-bis (3,4-epoxycyclohexyl) propane Is mentioned.

からなる群から選択される少なくとも１つのポリチオールを含む。
上記構造中、ｖは０又は１であり、ｔは１〜６（１と６を含む）の範囲の整数（例えば、１、２、３、４、５又は６）である。Ｒ^１４は、１〜３０個の炭素原子（例えば、１〜２０個の炭素原子、又は１〜１２個の炭素原子）を有するｔ価ヒドロカルビルラジカルである。一部の実施形態では、Ｒ^１４は脂肪族であり（すなわち、芳香族ではない）、一方、他の場合では少なくとも１個（例えば、１、２又は３個）の芳香環を含む。
Ｒ^１５は、１〜３０個の炭素原子（例えば、１〜２０個の炭素原子、又は１〜１２個の炭素原子）を有するアルキレン基、１〜３０個の炭素原子（例えば、１〜２０個の炭素原子、又は１〜１２個の炭素原子）を有するオキシアルキレン基、１〜３０個の炭素原子（例えば、１〜２０個の炭素原子、又は１〜１２個の炭素原子）を有するヒドロキシアルキレン基、４〜１００個の炭素原子（例えば、１〜５０個の炭素原子、又は１〜１２個の炭素原子）を有するポリオキシアルキレン基及びこれらの組み合わせからなる群から選択される。Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子（例えば、１〜２０個の炭素原子、又は１〜１２個の炭素原子）を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子（例えば、４〜５０個の炭素原子、又は４〜２０個の炭素原子）を有するアルキレンポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択される。Ｒ^１７は、１〜３０個の炭素原子（例えば、１〜２０個の炭素原子、又は１〜１２個の炭素原子）を有するアルキレン基である。 The curable composition according to the present disclosure is:

At least one polythiol selected from the group consisting of:
In the above structure, v is 0 or 1, and t is an integer (for example, 1, 2, 3, 4, 5 or 6) in the range of 1 to 6 (including 1 and 6). R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms (eg, 1 to 20 carbon atoms, or 1 to 12 carbon atoms). In some embodiments, R ¹⁴ is aliphatic (ie, not aromatic), while in other cases contains at least one (eg, 1, 2, or 3) aromatic ring.
R ¹⁵ is an alkylene group having 1 to 30 carbon atoms (for example, 1 to 20 carbon atoms, or 1 to 12 carbon atoms), or 1 to 30 carbon atoms (for example, 1 to 20 carbon atoms). Or oxyalkylene group having 1 to 12 carbon atoms), hydroxyalkylene having 1 to 30 carbon atoms (for example, 1 to 20 carbon atoms, or 1 to 12 carbon atoms) Selected from the group consisting of groups, polyoxyalkylene groups having 4 to 100 carbon atoms (e.g. 1 to 50 carbon atoms, or 1 to 12 carbon atoms) and combinations thereof. R ¹⁶ is an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms (for example, 1 to 20 carbon atoms, or 1 to 12 carbon atoms), It is selected from the group consisting of alkylene polyoxyalkylene groups having 4 to 100 carbon atoms (eg, 4 to 50 carbon atoms, or 4 to 20 carbon atoms), and combinations thereof. R ¹⁷ is an alkylene group having 1 to 30 carbon atoms (for example, 1 to 20 carbon atoms, or 1 to 12 carbon atoms).

Examples of useful polythiols include 1,6-hexanediol, 1,8-dimercapto-3,6-dithiaoctane, propane-1,2,3-trithiol, ethylene glycol bis (thioglycolate), pentaerythritol tetrakis ( 3-mercaptopropionate), ethylene glycol bis (3-mercaptopropionate), trimethylolpropane tris (thioglycolate), trimethylolpropane tris (3-mercaptopropionate) and pentaerythritol tetrakis (thioglycolate) ), Pentaerythritol tetrakis (3-mercaptopropionate) and 3,6-dioxa-1,8-octane, (HSCH ₂ CH (OH) CH ₂ OC ₆ H ₄ ) ₂ CH ₂ , (HSCH ₂ CH (OH ) CH ₂ O _{C 6 H 4) 2 C (} CH2) 2 and the like.

  Examples of commercially available polythiols include mercaptohydroxy soybean oil (eg, PM-358 available from Chevron Phillips Chemical Co. (The Woodlands, Texas), mercaptanized castor oil (eg, Chevron Phillips Chemical Y META 80 -C), dipentene dimercaptan and Henkel Corp. CAPCAPURE 3-800 epoxy hardener from (Dusseldorf Germany).

  Additional polythiols include high molecular weight thiols, which can be obtained by esterification from polypropylene-ether glycol (available as PLURACOL P201 from BASF Wyandotte Chemical Corp. (Wyandotte, Michigan)) and 3-mercaptopropionic acid. Mention may be made of polypropylene ether glycol bis (3-mercaptopropionate) which can be prepared.

  For example, a trace amount of monothiol may be added to the curable composition to control the physical properties of the resulting cured composition. When present, such monothiols are typically used in an amount up to about 0.2 equivalents of thiol groups in at least one polythiol.

  The curable composition according to the present disclosure typically has at least one 3-substituted benzoxazine x equivalents (x is a number greater than 0) and glycidyl groups y equivalents (y is a number greater than or equal to 0). Containing at least one polyepoxide and at least one polythiol z equivalent (z is a number greater than 0). In certain embodiments, y is 0. The values of x, y and z are selected such that z is in the range of 0.1 (x + y) to (x + y). In some embodiments, z ranges from 0.1 (x + y) to 0.3 (x + y).

  In embodiments where no glycidyl groups are present, the polyepoxide may be present in an amount of 1-50 weight percent (eg, 5-30 weight percent) based on the combined weight of polythiol, polyepoxide, and 3-substituted benzoxazine.

  The curable composition according to the present disclosure may optionally contain an acid catalyst to promote curing. When present, the acid catalyst is typically present in an amount that is effective to affect the cure rate of the curable composition (ie, an effective amount). Such an effective amount is typically an amount less than about 10 weight percent, more typically less than about 5 weight percent, and even less than about 1 weight percent, based on the total weight of the curable composition. .

  Examples of suitable acid catalysts include sulfuric acid, hydrogen chloride, hydrogen bromide, hydrogen iodide, trifluoroacetic acid, trichloroacetic acid, p-toluenesulfonic acid, perchloric acid, methanesulfonic acid, 2-aminoethanesulfonic acid, Examples include aluminum chloride, zinc chloride, boron trifluoride, antimony pentachloride, dibutyltin dilaurate and titanium tetrachloride.

In some embodiments, the optional acid catalyst comprises a superacid. Superacid, by definition, is a Bronsted acid that is more acidic than 100 percent sulfuric acid. Examples include liquid salts of substituted pentafluoroantimonic acids having the formula H ⁺ SbF ₅ X ⁻ , where X is halogen, hydroxy or —OR ¹⁴ (the above formula is about 10,000 grams). / Residues of aliphatic, cycloaliphatic or aromatic alcohols having a molecular weight of less than 1 mole and at least 1, preferably at least 2 primary or secondary hydroxy functional groups). Examples of R ¹⁴ include 2-hydroxyethoxy and 2- (2′-hydroxyethoxy) ethoxy. Examples of commercially available superacids include trifluoromethanesulfonic acid, and NACURE SUPER XC-7231 CATALYST (ammonium hexafluoroantimonate) and NACURE SUPER XC-A230 CATALYST (both King Industries (Norwalk). , Connecticut)).

  Curable compositions according to the present disclosure can generally be prepared by simply combining these components with mixing. In some cases, it may be desirable to warm one or more of the components prior to combining (eg, to melt the solid components).

  Curing of the curable composition is typically accomplished by heating a heat source. Examples of suitable heat sources include ovens, hot plates and infrared.

  In some embodiments, the present disclosure provides a B-stage composition (eg, as an adhesive sheet or tape). Processing applications such as printed circuit board manufacturing often involve staging adhesives (ie, can be placed on a substrate and partially cured to a tacky or non-tacky state, typically with heat and / or pressure. Adhesive composition) that can be used and cured. The partially cured non-tacky state is usually called “B stage”.

  The physical properties (eg, viscosity, tackiness, release and / or shear force) of the uncured B-stage and the cured composition can be easily achieved by using different amounts and types of each component in the curable composition. It can change.

  The reaction conditions for curing the curable composition depend on the reactants and amount used and can be determined by one skilled in the art. The curable composition can generally be made by mixing the benzoxazine compound, polyepoxide, polythiol and any catalyst in any order. In general, the curable composition is then heated to a sufficient temperature (eg, about 50 ° C. to 200 ° C.) for about 1 to 120 minutes, although other conditions can be used.

  Suitable heat sources include, for example, induction heating coils, ovens, hot plates, heat guns, infrared sources (eg, lasers), and microwave sources.

  Solvents can be used to aid in the preparation and / or coating of the curable composition and as a processing aid. For example, it may be advantageous to prepare a concentrated solution of the catalyst in a small amount of solvent to simplify the preparation of the polymerizable composition. Typical solvents include lactones (eg γ-butyrolactone, γ-valerolactone and ε-caprolactone), ketones (eg acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone and cyclohexanone), sulfones (eg tetramethylene). Sulfone, 3-methylsulfolane, 2,4-dimethylsulfolane, butadiene sulfone, methyl sulfone, ethyl sulfone, propyl sulfone, butyl sulfone, methyl vinyl sulfone, 2,2′-sulfonyldiethanol), sulfoxide (eg, dimethyl sulfoxide), Cyclic carbonates (eg, propylene carbonate, ethylene carbonate and vinylene carbonate), carboxylic acid esters (eg, ethyl acetate, methyl cellosolve acetate, methyl formate), methylene chloride, nitrome Down, acetonitrile, and sulphite glycol and 1,2-dimethoxyethane (glyme) is.

  In some cases, an auxiliary agent may be added to the curable composition. Examples include colorants, abrasive granules, antioxidant stabilizers, thermal decomposition stabilizers, light stabilizers, conductive particles, tackifiers, fillers, fluidizers, thickeners, matting agents, inert fillers. Agents, binders, foaming agents, fungicides, fungicides, surfactants, plasticizers, rubber tougheners, and other additives known to those skilled in the art.

  Compositions according to the present disclosure may include, for example, coatings, foams, molded articles, adhesives (such as structural and semi-structural adhesives), magnetic media, filled or reinforced composites, coated abrasives, caulking and sealing compounds. It is useful for casting and molding compounds, porcelain and encapsulating compounds, impregnation and coating compounds, conductive adhesives for electronics, protective coatings for electronics, and other applications known to those skilled in the art.

  In some embodiments, a curable composition according to the present disclosure is disposed on a liner (eg, when processed into a thermoset sheet or tape). Referring now to FIG. 1, an exemplary article 100 includes a curable composition 110 according to the present disclosure disposed on a first release liner 120. In some embodiments, the curable composition 110 is sandwiched between the first release liner 120 and the optional first release liner 130.

  Release liners are well known in the art and include, for example, silicon paper and polyolefin films (eg, polypropylene film). To make the article 100, the curable composition 110 can be coated or laminated, for example, to one or both of the release liners.

  The following non-limiting examples further illustrate the objects and advantages of the present disclosure, but the specific materials and amounts thereof described in these examples, as well as other conditions and details, unduly limit the present disclosure. It should not be interpreted as a thing.

Procedures and Test Methods Unless otherwise specified, amounts are given in equivalents (eq). Equivalents are based on moles of reactive groups per mole of reactant molecule. Thus, 2 equivalents of the bifunctional reactant represents 1 mole of the reactant, and 1 mole of trifunctional reactant represents 3 equivalents of the reactant. The catalyst is treated as being monofunctional.

  A portion of a given reaction mixture is placed in an open DSC pan made of aluminum and differential scanning calorimeter (Seiko Instruments USA, Inc. (Torrance, California)) at 25 ° C to 300 ° C at 10 ° C / min. The sample was heated and subjected to differential scanning calorimetry (DSC).

Cohesive force was measured using an overlap shear test (OLS). Overlap or “overlap” shear samples were made using 4 in × 7 in × 0.063 in (10 cm × 18 cm × 0.16 cm) 7075 T6 bare aluminum anodized according to Boeing Aircraft Company standard BAC-5555. The anodization voltage was 22.5 volts. Samples were made as described in ASTM test method D-1002. Specific thermal coating conditions were changed in each example as described below. In general, an adhesive strip of about 0.5 in (1.3 cm) x 0.15 mm was applied to one end of each of the two substrates using a scraper. Three piano wires with a diameter of 75 micrometers were used as spacers to control the thickness of the adhesive layer. The joint was closed and the edge was taped. The joint was placed between an aluminum foil sheet and a piece of cardboard. Pressure was applied using two 14 lb (6.4 kg) steel plates to spread the adhesive. After curing the adhesive (as described in each example), the large sample is cut into small 1 in (2.5 cm) wide samples and a 0.5 in ² (3.2 cm ² ) bonded area is formed. Brought. Six lap shear samples were obtained from each larger sample. Bonds were tested for fracture at room temperature with a SINTTECH tensile tester (MTS (Eden Prairie, Minnesota)) using a crosshead displacement rate of 0.1 in / min (0.25 cm / min). The breaking load was recorded. The adhesion surface width was measured with a caliper. The quoted lap shear force is calculated as (2 x breaking load) / (measured width). The average (mean value) and standard deviation were calculated from the results of 6 tests.

  Adhesion peel was determined using a T peel test (T peel). T peel values were measured using 4 in x 8 in x 0.025 in (10 cm x 20 cm x 64 mm) 7075 T6 bare aluminum anodized according to Boeing Aircraft Company standard BAC-5555. The anodization voltage was 22.5 volts. The test was performed according to ASTM D-1876; Standard Test Method for Peel Resistance of Adhesives “T-Pel Test”, Annual Book of ASTM Standards, vol. 15.06, pp. 115-117 (1995). A 2 in x 5 in x 10 mil strip (5 cm x 13 cm x 25 micrometers) of the adhesive prepared in the given example was applied to both of the two anodized aluminum substrates. To adjust the bondline thickness, a 10 mil (0.25 micrometer) thick spacer made from brass shims was applied to the edge of the bonded area. The joint was closed and adhesive tape was applied to hold the adherend together during curing. Adhesive joints were provided between the aluminum foil sheets and between the cardboard pieces. Pressure was applied using four 14 lb (6.4 kg) steel plates to spread the adhesive. The assembly was placed in an oven and heated to 130 ° C. for 1 hour. After allowing the adhesive to cool to room temperature, the large sample was cut into 1 in (2.5 cm) wide samples to obtain two 1 in (2.5 cm) wide samples. Bonds were tested for failure at room temperature on a Sintech tensile tester using a crosshead displacement rate of 12 in / min (30 cm / min). The initial part of the load data was ignored. After peeling about 1 in (2.5 cm), the average load was measured. The T peel strength was an average of three peel measurements, and was 2.2 lb / in (3.8 N / cm).

  Dynamic mechanical analysis (DMA) was performed as follows. A given reaction mixture was placed on a rectangular silicone rubber mold, sandwiched between two PET sheets coated with a silicone release liner, and pressed between glass plates. This mold consisted of 10 sheets of 1 mm thickness with rectangular cutouts (5 mm × 30 mm) to prepare samples for dynamic mechanical analysis. This fixed composition was then placed in an oven at 130 ° C. for 30 minutes. The assembly was then allowed to cool to room temperature. Dynamic mechanical analysis was performed on a Seiko Dynamic Mechanical Analyzer (DMA) at a heating rate of 2 ° C./min at temperatures ranging from −80 ° C. to 260 ° C. in tensile mode. Storage modulus (E '), loss rate (E ") and loss factor were recorded.

Example 1
2.95 g (0.01 mol, 10 eq thiol) in a mixture of 2.08 g (0.009 mol, 9 eq benzoxazine) finely ground BNZOX and 0.2 g (0.001 mol or 1 eq epoxide) EPOXY 1 Of THIOL 1 was added at room temperature. These ingredients were agitated until a homogeneous mass was taken and a portion was collected and the DSC trace labeled Ex. 1 was obtained.

  Without being bound by theory, it is believed that the first broad cure peak at about 60 ° C. to 80 ° C. is caused by the reaction of glycidyl epoxide functional groups with thiols. This reaction appears to already proceed at room temperature. After partial curing, a B-stage adhesive is obtained. Further curing can be achieved, as evidenced by a peak at about 175 ° C. This peak is believed to be the result of benzoxazine ring opening by thiol. The third cure peak at about 220 ° C. is believed to be the result of homopolymerization of benzoxazine after the thiol functional group has been depleted.

(Example 2)
2.95 g (0.01 mol thiol) THIOL 1 in a mixture of 2.31 g (0.01 mol benzoxazine) finely ground BNZOX and 1.75 g (25 percent of the total weight of the reactants) EPOXY 2 Was added at room temperature. These components were stirred until a homogeneous mass was collected, and a portion was collected and the DSC trace labeled Ex. 2 was obtained.

  Without being bound by theory, the slow onset of the first cure peak compared to the first cure peak of Example 1 is used in the glycidyl epoxide used in Example 1 and in Example 2. The difference in reactivity of the alicyclic epoxide is considered to be the cause. This peak has a maximum value at about 97 ° C. and is considered to represent a combination of the thiol-benzoxazine reaction and epoxide homopolymerization. A B-stage curing peak at a higher temperature appears as in Example 1.

(Example 3)
2.95 g (0.01 mol thiol) THIOL 1 in a mixture of 2.31 g (0.01 mol benzoxazine) finely ground BNZOX and 0.58 g (10 percent of the total weight of the reactants) EPOXY 2 Was added at room temperature. These ingredients were stirred until a homogeneous mass was obtained. The reaction mass was kept at room temperature for 2 days, after which a portion was collected and the DSC tracking label Ex. 3 was obtained.

  Without being bound by theory, there is no significant cure peak below 130 ° C. because the sample was held for 2 days at room temperature, although slowly but without B-stage adhesion. This is thought to be the result of the agent being almost completely cured. Again, two B-stage cure peaks at higher temperatures appear similar to those of Examples 1 and 2.

Example 4
0.055 g (1 percent of total reactant weight) of catalyst dissolved in 2.46 g (0.0083 mol, 83 eq thiol) THIOL 1 and 0.22 g (0.0017 mol, 17 eq thiol) THIOL 2 To 1, a mixture of 2.31 g (0.01 mol, 100 eq benzoxazine) of finely ground BNZOX and 0.5 g (10 percent of the total weight of the reactants) of EPOXY 2 was added at room temperature. These components were stirred until a homogeneous mass was collected, and a portion was collected and the DSC trace labeled Ex. 4 was obtained.

  Without being bound by theory, it is believed that the addition of the superacid catalyst in Example 4 has two effects. The onset of the first stage of curing moves to lower temperatures and the curing of the B stage adhesive is sharper and more pronounced.

(Examples 5 to 8)
Four benzoxazine adhesive compositions were prepared to evaluate adhesive properties.

  For Examples 5 and 6, EPOXY 2 was used as the epoxide component. For Examples 7 and 8, EPOXY 1 was used as the epoxide component. For each of Examples 5-8, 1 equivalent of the epoxide component was mixed with 9 equivalents of BNZOX and heated to 100 ° C. with stirring for 30 minutes. For Examples 5 and 6, 9 equivalents of THIOL 4 and THIOL 1 were each added to the mixture of epoxide and benzoxazine at 100 ° C. For Examples 7 and 8, 10 equivalents of THIOL 4 and THIOL 1 were added to the mixture of epoxide and benzoxazine at 100 ° C., respectively. The compositions employed in Examples 5-8 are summarized in Table 1 (below).

  The reactive composition was placed between two silicone-coated polyester liners and a 125 micrometer thick film was made by pulling the sandwich structure with a “hot knife” at 100 ° C. The film thus prepared was used to prepare samples for the above overlap shear and T peel tests. Curing of some test samples of Example 5 and Example 7 was carried out at 190 ° C. for 2 hours. These were designed as samples 5a and 7a. Curing of some test samples of all four examples was performed at 155 ° C. for 10 hours, and these were designated as Examples 5b, 6b, 7b and 8b. The overlap shear and T peel tests were performed as described above. The results are shown in Table 2 (below).

(Examples 9 to 12)
Example 9 was prepared as follows: 10 parts by weight THIOL 3 and 90 parts by weight THIOL 4 were combined at 80 ° C. with mixing. The same equivalent amount of BNZOX was added to this mixture with mixing at 100 ° C.

  Example 10 was prepared as follows: 10 parts by weight THIOL 3 and 90 parts by weight THIOL 1 were combined with mixing at 80 ° C. The same equivalent amount of BNZOX was added to this mixture with mixing at 100 ° C.

  Example 11 was prepared as follows: 9 parts by weight of BNZOX was combined with 1 part by weight of EPOXY 3 with mixing at 100 ° C. for 10 minutes and stirred until homogeneous. To this mixture was added the same equivalent of THIOL 4 with mixing at 100 ° C.

  Example 12 was prepared as follows: 9 parts by weight of BNZOX was combined with 1 part by weight of EPOXY 3 at 100 ° C. with mixing for 10 minutes and stirred until homogeneous. To this mixture was added the same equivalent of THIOL 1 at 100 ° C. with mixing.

  The above composition was placed between two silicone-coated polyester liners, and a film having a thickness of 125 micrometers was prepared by pulling the sandwich structure with a “hot knife” at 100 ° C. The film thus prepared was used to prepare samples for the above overlap shear and T peel tests. Curing of the test sample was carried out at 150 ° C. for 2 hours. The overlap shear and T peel tests were performed as described above. The results are shown in Table 3 (below).

  T peel values were significantly higher than those observed for Examples 5-8.

  Dynamic mechanical analysis of each of the compositions of Examples 9-12 was performed as described above. The loss rate data for each is shown in FIG. For each composition, it was observed that the endpoint on the high temperature side of the peak loss rate had a maximum at temperatures below -80 ° C. This is evidence that the incorporation of siloxane moieties was introduced in Examples 9-12 in two ways (one epoxide route and the other thiol route). This increase in flexibility is likely due to an improvement in the T peel value.

(Examples 13 to 16)
The action of moisture can be detrimental to high temperature adhesives, especially under high temperature conditions. If the adhesive loses its modulus due to water uptake, its use in structural applications becomes a problem. The adhesive of the present invention combines the moisture resistance found in sulfur-containing organic materials with the superior moisture resistance of benzoxazine. The effect on moisture resistance by adding 10 weight percent of the corresponding epoxide was investigated by a humidity test.

  For Examples 13-16, the compositions of Examples 5-8 were mixed at 100 ° C. as described above. For each, the mixture was poured into a 1 mm thick silicone rubber mold, sandwiched between two silicone coated PETs and pressed between two pieces of glass. The construct was then placed in an oven, cured at 150 ° C. for 2 hours, and removed from the mold. Two samples for each example were prepared in this manner and each of the eight samples was post-cured using a temperature gradient of 2 ° C./min up to 280 ° C. in DMA and cooled to room temperature. Next, one sample of each example (designated “WET”) under reflux was placed in boiling water for 24 hours, blot dried, and then evaluated in DMA tensile mode. Other samples of each example (denoted “DRY”) were evaluated in DMA tensile mode without any further treatment. All four compositions performed very well in this test, but only the composition of Example 13 was significantly less elastic.

  4a-4d show the storage moduli of Examples 13-16 under "WET" and "DRY", respectively. About Example 13, it turns out that the fall of the storage elastic modulus by a boiling water process is negligible. In Example 15, the boiling water treatment is substantially unchanged. Example 16 shows a slight decrease in storage modulus at low temperatures as a result of boiling water treatment, but a slight increase in storage modulus at high temperatures, with an intersection occurring just above 100 ° C. Yes. In Example 14, even when the boiling water treatment was performed, the storage elastic modulus was almost unchanged up to 100 ° C., but at a temperature exceeding 100 ° C., the storage elastic modulus showed a significant increase. Without being bound by theory, it is believed that the increase in storage modulus shown by Examples 14 and 16 can be attributed to the additional curing that occurs at 100 ° C. during immersion in boiling water. Is a desirable property in some applications.

5a-5d show the loss factor or tan δ for “WET” and “DRY” for Examples 13-16, respectively. The tan δ peak is generally considered to be a measure of the glass transition temperature T _g . Each "DRY" sample showed a single T _g, which was slightly different with the composition. Each of the “WET” samples shows two peaks, the smaller peak moving to a lower temperature, the larger peak being the same temperature (Example 13), a slightly higher temperature (Example 15), a somewhat higher temperature (Example 16) and Appeared at a significantly higher temperature (Example 14). Without being bound by theory, it is also believed to be evidence that additional curing occurs in boiling water for compositions containing at least THIOL 1 thiol. This may be due to the presence of ester bonds in polymers derived from THIOL 4 thiols and the absence of ester bonds in polymers derived from THIOL 1 thiols.

(Examples 17 to 27)
In order to show a wide range of advantageous high _Tg values that can be achieved in the adhesives of the invention when using a very short duration cure cycle, the same procedure as in the previous examples was used to A composition was prepared. Reaching the high T _g in short cure cycle is advantageous in many applications. The composition is as reported in Table 4 (below) and the amounts are given in equivalents.

Each composition was cured at 150 ° C. for 10 minutes. Dynamic mechanical analysis was performed as described above. FIG. 6 shows tan δ data for each of Examples 17-27. Example 21 is the only component of this example set that was made without any epoxide component. The T _g shown in Example 21 has the lowest loss factor peak was about 61 ° C.. FIG. 6 shows that the benzoxazine-thiol-epoxide composition (Examples 17-20) as demonstrated by the loss factor peak ranging from about 78 ° C. (for Example 22) to about 107 ° C. (for Example 25). and 22-27) indicates that exhibit a wide range of high _{T g} values. By adjusting the type of thiol component, catalyst and catalyst concentration, and the ratio of benzoxazine component, epoxide component, and thiol component, the range of _Tg values obtained is continuous and shown by these examples. It should be at least slightly broader than.

（式中、
ｖは０又は１であり、
ｔは１〜６（１と６を含む）の範囲の整数であり、
Ｒ^１４は、１〜３０個の炭素原子を有するｔ価ヒドロカルビルラジカルであり、
Ｒ^１５は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するヒドロキシアルキレン基、１〜３０個の炭素原子を有するオキシアルキレン基、４〜１００個の炭素原子を有するポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択され、
Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子を有するアルキレンポリオキシアルキレン基及びこれらの組み合わせからなる群から選択され、
Ｒ^１７は、１〜３０個の炭素原子を有するアルキレン基である）からなる群から選択される少なくとも１つのポリチオールをｚ当量（ｚは０を超える数であり、ｚは０．１（ｘ＋ｙ）〜（ｘ＋ｙ）の範囲である）と、
を含む硬化性組成物を提供する。 Selective Embodiments of the Present Disclosure In a first embodiment, the present disclosure comprises:
At least one 3-substituted benzoxazine in x equivalents (x is a number greater than 0);
At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 1 to 6 (including 1 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
A curable composition is provided.

  In a second embodiment, the present disclosure provides a curable composition according to the first embodiment, wherein z is in the range of 0.1 (x + y) to 0.3 (x + y).

  In a third embodiment, the present disclosure provides a curable composition according to the first or second embodiment, wherein y ranges from 0.1x to x.

  In a fourth embodiment, the present disclosure provides a curable composition according to any of the first to third embodiments, wherein at least one polyepoxide comprises a polyepoxide having a glycidyl group.

  In a fifth embodiment, the present disclosure provides a curable composition according to any of the first to fourth embodiments, wherein the at least one polyepoxide comprises a polyepoxide having no glycidyl group.

  In a sixth embodiment, the present disclosure provides a curable composition according to any of the first to fifth embodiments, further comprising an acid.

  In a seventh embodiment, the present disclosure provides a curable composition according to any of the first to sixth embodiments, wherein the acid comprises a superacid.

  In an eighth embodiment, the present disclosure provides a curable composition according to any of the first to seventh embodiments, wherein the curable composition comprises a B-stage curable composition.

（式中、
ｖは０又は１であり、
ｔは１〜６（１と６を含む）の範囲の整数であり、
Ｒ^１４は、１〜３０個の炭素原子を有するｔ価ヒドロカルビルラジカルであり、
Ｒ^１５は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するヒドロキシアルキレン基、１〜３０個の炭素原子を有するオキシアルキレン基、４〜１００個の炭素原子を有するポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択され、
Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子を有するアルキレンポリオキシアルキレン基及びこれらの組み合わせからなる群から選択され、
Ｒ^１７は、１〜３０個の炭素原子を有するアルキレン基である）からなる群から選択される少なくとも１つのポリチオールをｚ当量（ｚは０を超える数であり、ｚは０．１（ｘ＋ｙ）〜（ｘ＋ｙ）の範囲である）と、
を含む硬化性組成物を供給することと、
硬化性組成物を硬化する工程と、を含む。 In a ninth embodiment, the present disclosure provides a method for curing a composition comprising:
At least one 3-substituted benzoxazine in x equivalents (x is a number greater than 0);
At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 1 to 6 (including 1 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
Providing a curable composition comprising:
Curing the curable composition.

  In the tenth embodiment, the present disclosure provides the method according to the ninth embodiment, wherein z ranges from 0.1 (x + y) to 0.3 (x + y).

  In an eleventh embodiment, this disclosure provides a method according to the ninth or tenth embodiment, wherein y is 0.1x to x.

  In a twelfth embodiment, the present disclosure provides a method according to any of the ninth to eleventh embodiments, wherein the at least one polyepoxide comprises a polyepoxide having a glycidyl group.

  In a thirteenth embodiment, the present disclosure provides a method according to any of the ninth to twelfth embodiments, wherein the at least one polyepoxide comprises an alicyclic polyepoxide having no glycidyl group.

  In a fourteenth embodiment, the present disclosure provides a method according to any of the ninth to thirteenth embodiments, wherein the curable composition further comprises a superacid.

（式中、
ｖは０又は１であり、
ｔは１〜６（１と６を含む）の範囲の整数であり、
Ｒ^１４は、１〜３０個の炭素原子を有するｔ価ヒドロカルビルラジカルであり、
Ｒ^１５は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するヒドロキシアルキレン基、１〜３０個の炭素原子を有するオキシアルキレン基、４〜１００個の炭素原子を有するポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択され、
Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子を有するアルキレンポリオキシアルキレン基及びこれらの組み合わせからなる群から選択され、
Ｒ^１７は、１〜３０個の炭素原子を有するアルキレン基である）からなる群から選択される少なくとも１つのポリチオールをｚ当量（ｚは０を超える数であり、ｚは０．１（ｘ＋ｙ）〜（ｘ＋ｙ）の範囲である）と、
を含む。 In a fifteenth embodiment, the present disclosure provides a tack-free reaction product of a curable composition, the curable composition comprising:
At least one 3-substituted benzoxazine in x equivalents (x is a number greater than 0);
At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 1 to 6 (including 1 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
including.

  In a sixteenth embodiment, the present disclosure provides a tack-free reaction product according to the fifteenth embodiment, wherein z ranges from 0.1 (x + y) to 0.3 (x + y).

  In a seventeenth embodiment, the present disclosure provides a tack-free reaction product according to the fifteenth or sixteenth embodiment, wherein y ranges from 0.1x to x.

  In an eighteenth embodiment, the present disclosure provides a tack-free reaction product according to any of the fifteenth to seventeenth embodiments, wherein the at least one polyepoxide comprises a polyepoxide having a glycidyl group.

  In a nineteenth embodiment, the present disclosure provides a tack-free reaction product according to any of the fifteenth to eighteenth embodiments, wherein the at least one polyepoxide comprises a polyepoxide having no glycidyl group.

  In a twentieth embodiment, the present disclosure provides a tack-free reaction product according to any of the fifteenth to nineteenth embodiments, wherein the component further comprises an acid.

  In a twenty-first embodiment, the present disclosure provides a tack-free reaction product according to any of the fifteenth to twenty-first embodiments, wherein the acid further comprises a superacid.

（式中、
ｖは０又は１であり、
ｔは１〜６（１と６を含む）の範囲の整数であり、
Ｒ^１４は、１〜３０個の炭素原子を有するｔ価ヒドロカルビルラジカルであり、
Ｒ^１５は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するヒドロキシアルキレン基、１〜３０個の炭素原子を有するオキシアルキレン基、４〜１００個の炭素原子を有するポリオキシアルキレン基、及びこれらの組み合わせからなる群から選択され、
Ｒ^１６は、１〜３０個の炭素原子を有するアルキレン基、１〜３０個の炭素原子を有するアルキレンオキシアルキレン基、４〜１００個の炭素原子を有するアルキレンポリオキシアルキレン基及びこれらの組み合わせからなる群から選択され、
Ｒ^１７は、１〜３０個の炭素原子を有するアルキレン基である）からなる群から選択される少なくとも１つのポリチオールをｚ当量（ｚは０を超える数であり、ｚは０．１（ｘ＋ｙ）〜（ｘ＋ｙ）の範囲である）と、
を含む。 In an eighteenth embodiment, the present disclosure provides an article comprising a curable composition disposed on a first release liner, the curable composition comprising:
At least one 3-substituted benzoxazine in x equivalents (x is a number greater than 0);
At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 1 to 6 (including 1 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
including.

  In a twenty-second embodiment, the present disclosure provides an article according to the twenty-first embodiment, wherein the curable composition is sandwiched between a first release liner and a second release liner.

  All examples described herein are to be considered non-limiting unless otherwise indicated. Those skilled in the art can make various modifications and changes to the present disclosure without departing from the scope and spirit of the present disclosure, and the present disclosure is unnecessary for the exemplary embodiments described above. It should be understood that it should not be limited.

Claims (4)

A curable composition comprising:
X equivalents of at least one 3-substituted benzoxazine selected from the following group (where x is a number greater than 0);

At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 2 to 6 (including 2 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
A curable composition comprising: A method of curing the composition, the method comprising:
X equivalents of at least one 3-substituted benzoxazine selected from the following group (where x is a number greater than 0);

At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 2 to 6 (including 2 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
Providing a curable composition comprising:
Curing the curable composition. A tack-free reaction product of a curable composition, wherein the curable composition is
X equivalents of at least one 3-substituted benzoxazine selected from the following group (where x is a number greater than 0);

At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 2 to 6 (including 2 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
A tack-free reaction product comprising An article comprising a curable composition disposed on a first release liner, the curable composition comprising:
X equivalents of at least one 3-substituted benzoxazine selected from the following group (where x is a number greater than 0);

At least one polyepoxide containing y equivalents (y is a number of 0 or more) of glycidyl groups;

(Where
v is 0 or 1,
t is an integer ranging from 2 to 6 (including 2 and 6);
R ¹⁴ is a t-valent hydrocarbyl radical having 1 to 30 carbon atoms;
R ¹⁵ represents an alkylene group having 1 to 30 carbon atoms, a hydroxyalkylene group having 1 to 30 carbon atoms, an oxyalkylene group having 1 to 30 carbon atoms, and 4 to 100 carbon atoms. Selected from the group consisting of polyoxyalkylene groups having, and combinations thereof,
R ¹⁶ is composed of an alkylene group having 1 to 30 carbon atoms, an alkyleneoxyalkylene group having 1 to 30 carbon atoms, an alkylene polyoxyalkylene group having 4 to 100 carbon atoms, and a combination thereof. Selected from the group,
R ¹⁷ is a z equivalent of at least one polythiol selected from the group consisting of 1 to 30 carbon atoms), wherein z is a number greater than 0 and z is 0.1 (x + y) To (x + y)).
Including an article.

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